scispace - formally typeset
Search or ask a question
Institution

Universidade Estadual de Londrina

EducationLondrina, Brazil
About: Universidade Estadual de Londrina is a education organization based out in Londrina, Brazil. It is known for research contribution in the topics: Population & Toxoplasma gondii. The organization has 13052 authors who have published 19291 publications receiving 212123 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: An overview of the recently developed approaches and latest research carried out in near and mid-infrared spectral technology for evaluating the quality and composition of coffee and the possibility of its widespread deployment is provided.

174 citations

Journal ArticleDOI
TL;DR: Alternative methods of inoculation that were as effective as the standard seed inoculation are identified that may represent an important strategy to avoid the incompatibility between inoculant bacteria and pesticides employed for seed treatment.
Abstract: The utilization of inoculants containing Azospirillum is becoming more popular due to increasing reports of expressive gains in grain yields. However, incompatibility with pesticides used in seed treatments represents a main limitation for a successful inoculation. Therefore, in this study we searched for alternatives methods for seed inoculation of maize and wheat, aiming to avoid the direct contact of bacteria with pesticides. Different doses of inoculants containing Azospirillum brasilense were employed to perform inoculation in-furrow, via soil spray at sowing and via leaf spray after seedlings had emerged, in comparison to seed inoculation. Experiments were conducted first under greenhouse controlled conditions and then confirmed in the field at different locations in Brazil. In the greenhouse, most parameters measured responded positively to the largest inoculant dose used in foliar sprays, but benefits could also be observed from both in-furrow and soil spray inoculation. However, our results present evidence that field inoculation with plant-growth promoting bacteria must consider inoculant doses, and point to the need of fine adjustments to avoid crossing the threshold of growth stimulation and inhibition. All inoculation techniques increased the abundance of diazotrophic bacteria in plant tissues, and foliar spray improved colonization of leaves, while soil inoculations favored root and rhizosphere colonization. In field experiments, inoculation with A. brasilense allowed for a 25 % reduction in the need for N fertilizers. Our results have identified alternative methods of inoculation that were as effective as the standard seed inoculation that may represent an important strategy to avoid the incompatibility between inoculant bacteria and pesticides employed for seed treatment.

172 citations

Journal ArticleDOI
TL;DR: In this article, the prevalence of global and central obesity through the body mass index (BMI) and the waist-to-hip ratio (WHR) was evaluated as the risk factors related to the excess of body fat and to the central pattern of distribution of fat, such as diabetes mellitus, hypertension, hypercholesterolaemia, low levels of high density lipoprotein cholesterol (HDL-c), hypertriglyceridaemia, smoking, practice of physical activities, and social level.
Abstract: Objective: The goal was to define the prevalence of global and central obesity through the body mass index (BMI) and the waist-to-hip ratio (WHR). Besides, the associations between BMI and WHR were evaluated as the risk factors related to the excess of body fat and to the central pattern of distribution of fat, such as diabetes mellitus (DM), hypertension, hypercholesterolaemia, low levels of high density lipoprotein cholesterol (HDL-c), hypertriglyceridaemia, smoking, practice of physical activities, and social level. Methodology: Through a cross-sectional study, 847 outpatients 60 years old or more were evaluated. Results: Obesity was detected in 9.3% of the men and 23.8% of the women (p = percentile 75 (WHR> 1.01 for men and WHR> 0.96 for women) presented higher frequencies of hypertension, DM, low HDL-c, and hypertriglyceridaemia in the male and hypertension and DM in the female. Conclusions: The results reveal differences in relation to sex, with men presenting lower prevalence of obesity and higher associations between BMI or WHR, with risk factors related to the body fat. The data obtained contribute to the amplification of the anthropometric reference of the elderly, besides identifying the characteristics of the correlations between the anthropometric indicators and the metabolic alterations associated with obesity.

167 citations

Journal ArticleDOI
TL;DR: Transmission electron microscopy of S. aureus treated with resin oil from C. martii revealed disruption and damage to the cell wall, resulting in the release of cytoplasmic compounds, alterations in morphology, and a decrease in cell volume, indicating that copaiba oil may affect the cell walls.
Abstract: The antimicrobial activity of copaiba oils was tested against Gram-positive and Gram-negative bacteria, yeast, and dermatophytes. Oils obtained from Copaifera martii, Copaifera officinalis, and Copaifera reticulata (collected in the state of Acre) were active against Gram-positive species (Staphylococcus aureus, methicillin-resistant S. aureus, Staphylococcus epidermidis, Bacillus subtilis, and Enterococcus faecalis) with minimum inhibitory concentrations ranging from 31.3-62.5 µg/ml. The oils showed bactericidal activity, decreasing the viability of these Gram-positive bacteria within 3 h. Moderate activity was observed against dermatophyte fungi (Trichophyton rubrum and Microsporum canis). The oils showed no activity against Gram-negative bacteria and yeast. Scannning electron microscopy of S. aureus treated with resin oil from C. martii revealed lysis of the bacteria, causing cellular agglomerates. Transmission electron microscopy revealed disruption and damage to the cell wall, resulting in the release of cytoplasmic compounds, alterations in morphology, and a decrease in cell volume, indicating that copaiba oil may affect the cell wall.

166 citations

Journal ArticleDOI
TL;DR: In this article, the effect of cellulose fibers on the mechanical and physicochemical properties of starch-based films plasticized with glycerol was investigated, and the results showed that cellulose-fibrous films had higher tensile strength and rigidity, but lower elongation capacity.

165 citations


Authors

Showing all 13138 results

NameH-indexPapersCitations
Michael Maes11580752050
Fernando Q. Cunha8868231501
Mariangela Hungria6738915219
Petar Popovski5975621009
Waldiceu A. Verri5424910311
Thiago M. Cunha542689519
Emerson Franchini524029620
Celso Vataru Nakamura5141810908
Diego Augusto Santos Silva5138953077
Susan M. Tarlo5026310850
Paulo Caramelli453669666
Fabio Pitta4421311925
Joaquim Gama-Rodrigues432258380
Ricardo Almeida432507304
Hamilton Roschel432355894
Network Information
Related Institutions (5)
Sao Paulo State University
100.4K papers, 1.3M citations

93% related

Federal University of Paraná
46.6K papers, 546.5K citations

92% related

Universidade Federal do Rio Grande do Sul
89.4K papers, 1.4M citations

91% related

Universidade Federal de Minas Gerais
75.6K papers, 1.2M citations

90% related

Universidade Federal de Santa Catarina
55.4K papers, 714.4K citations

90% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202324
2022151
20211,220
20201,433
20191,333
20181,308